
<template>
  <div>
    这是model---子组件---
    <button @click="hClick">子组件按钮</button>
  </div>
</template>
<script>
export default {
  props: {
    aa: {
      type: Number,
      default: 0
    }
  },
  methods: {
    hClick() {

    }
  }
}
</script>
